If your stylist has told you never to buy your expensive shampoo at the grocery store because it's "contaminated," he or she is misinformed. You can get it for less there because, as always, big stores buy in bulk.
Salon-brand manufacturers say they don't sell to Wal-Mart, and there's something wrong with the bottles you see there. In fact, the salon-brand manufacturers don't sell to any stores. They sell to distributors, and those distributors then sell to salons. And to Wal-Mart. Technically, they're not supposed to sell to Wal-Mart but they do. It's called diverted product, and it's the same stuff you find at your salon.
Counterfeit bottles do show up, but not at Wal-Mart or Target or Albertson's. Those places are buying from distributors, not off a truck.
Up next: Is it really worth the money?